A niche is an inset shelf that can remain empty or hold personal objects such as a statue. It adds a dimension of depth and texture. Sometimes, I’ve put lights in these niches. I’ve even done a shadow box technique using a translucent onyx stone that is backlit. The wall I did for Wilbur Hot Springs contains a number of niches in which visitors have arranged feathers and various found objects. One of these is a shadow box that has an onyx stone with a cutout, metal design of their logo.